Fuel-burning device.



W. C. SKINNER.

FUEL BURNING DEVICE.

APPLICATION FILED FEB. 28. I916.

L fi ggfi I Patented May 8, 1917.

2 SHEETS-SHEET I.

(Juno/idea L7 7 122mm C SEW/2e,"

Gimme/153 W. C. SKINNER.

FUEL BURNING DEVICE.

APPLICATJON FILED FEB. 28. 1916.

1,2253%, Patented May8,1917.

2 SHEETS-SHEET 2.

the room when the fuel is being fed through the door M, I preferablyconnect the latter by a link or arm N to a gas escaping valve or door N.Thus, when the door M is opened the valve or door N will besimultaneously opened and if there is any gaspocketed above the fire boxit will pass directly into the drum portion 0 of the stove. The latteris connected to the combustion chamber by a conduit P above whichasuitable baflle plate P is located. The purpose of the latter is tocompel the heat products of combustion to pass outwardly adjacent to theheat radiating surface of the drum, and if desired an oven Q can bepositioned within the drum, access to this oven being had through ahinged door Q.

Describing in detail the construction of the grate G, it will'be noticedthat the latter comprises a plurality of inclined surfaces G betweenwhich are a plurality of openings Gr controlled by a sliding grate B. At

its center this grate slides over aplate It secured to the main portionof the grate by suitable chair-bolts R It will be noticed that themovable member R of the grate has spaced apertures adapted when thegrate pull S is drawn forward to register with the apertures in thegrate G, and thus permit the ashes to pass into'the pan or tray E. Themovable member It is normally held in closed position by means of aspring R while from its upper surface there projects a plurality of pinsB or other agitating members adapted to loosen the ashes so as to causethem to pass through the grate. As the combustion is so complete'in thisdevice that there areno clinkers formed andv the ashes are in the formof a fine powder, a

grate of this character is peculiarly adapted to my device and bylocating the movable member at the bottom any binding of the 1 partsthrough ashes getting beneath the movable member is avoided.

At the lower end of the combustion chamber there is an opening Tcontrolled by a mixer valve T, the purpose of this opening and valvebeing to supply an additional amount of air to the mixture in thecombustion chamber. In order that there will always be a supply of airin the lower chamber D the valve U controlling the air inlet o ')eningsU is normally held open by a spring, such as V Passage of air throughthe opening vT is however adjustably controlled by the valve T. lVhile Ihave shown a valve of the butterfly type, a gate or other suitable valve.could of course be employed.

The air that passes through the fuel to form thecombustible mixture isfed into the air chambers K through apertures controlled by the slide Z,each of which are provided with operating handles or knobs Z. Thus theair is fed laterally into the fuel, through the fuel, and into thecombustion chamber, and is there augmented by an additional supply ofair in a manner similar to a Bunsen burner. There an intense heat isgenerated which passes up through the conduit P, that forms an extensionof the combustion chamber, and from the latter is discharged into thedrum, though it is obvious that from the extension P they might bedelivered to a laterally extending pipe or an oven positioned at theside or elsewhere if desired. p

The balfie plate P is supported on a plurality of legs, and afterpassing the bafile plate the products of combustion will be dischargedthrough the flue outlet Y. A suitable sight opening or peep hole Wcovered with mica. or the like is employed so that the operator can tellwithout opening the stove if the proper combustion is taking place. Inthe normal operation of the device, there should be such complete combustion that practically no smoke or soot reaches the flue opening Y.

Also as previously mentioned any escape of gas into the room is avoidedby the automatically controlled valves or door N, which may bepositioned either above the fuel hopper as shown at the left in Fig. 1or in the extension P as shown at the right ofthis figure. In eithercase the valves or doors N will be located in different vertical planesthan the fuel hoppers so as to avoidany danger of fuel being thrownthrough the doors N. In assembling the parts the three sections of themain combustion chamber wall I, are held in place at their upper ends bya flange W formed on the lower edge of the sections of the extension P.The latter is also formed in sections as shown in Fig. 3, the sectionsof this member being locked together by securing members Y.

The invention however is not limited to these features of constructionexcept as speci fied in the claims, and while I have shown and describedthe invention as applied to a stove it is not limited to such use, sincein its broader aspects it applies also to furnaces, boilers, car heatersand other fuel burning devices.

What I claim as my invention is:

1. In a fuel burning device, the combination with the fuel chamber, of acombustion chamber located centrally of said fuel chamber, an airchamber outside of said fuel chamber, there being openings forpermitting air to pass laterally from the air chamber through the fuelchamber to the combustion chamber, and a normally closed grate beneathsaid fuel chamber and air chamber,

said grate being adjustable to provide open ings through which finelydivided ash can. be removed from the fuel chamber and the air chamber.

2. In a fuel burning device, the combination with the fuel chamber, of acombuseaaaeo tion chamber, an air chamber outside of said fuel chamber,there being openings for permitting air to pass laterally from the airchamber through the fuel chamber to the combustion chamber, and anormally closed grate beneath said fuel chamber and air chamber, saidgrate being adjustable to provide openings through which finely dividedash can be removed from the fuel chamber and the air chamber, said gratehaving an upper stationary part and a lower movable part.

3. In a fuel burning device, the combination with an outer Wall, aninner Wall and a central Wall spaced from each other a su$ cientdistance to provide a combustion chamber, a fuel chamber outside of saidcombustion chamber and an air chamber outside of said fuel chamber, saidcombustion chamber having an outlet for the heated gases, and an airinlet at its lower end, said Walls being provided with apertures topermit a transverse draft from the air chamber, through the fuel chamberto the combustion chamber, the draft apertures being arranged to preventthe discharge from the air chamber of ash or dust through suchapertures, and means for cleaning the air chamber from ash or dust.

In testimony whereof laifix my signature.

LLIAM O. SKINNER.

